<template>
    
    <div>
cout 的数据变化之后是多少；{{ count }}
    </div>
    <button @click="count++">点击我</button>
    <ul v-for="item in arr">{{item}}</ul>
</template>

<script>
//<!-- 选项式api 是默认包含响应式操作的 -->
    export default {
        data(){

            return{
                arr:["春","夏","秋","冬"],
                count:0

            }
        }
        
    }
</script>

<style scoped>

</style>